Now the charge is replaced by an electrically neutral piece of initially unmagne

Question

Now the charge is replaced by an electrically neutral piece of initially unmagnetized soft iron (for example, a nail) that is not moving. (Intro 3 figure)

As a result of the magnetic interaction between the soft iron and the bar magnet, which of the following will occur? Choose the correct answer

a) The magnet will experience a torque due to the iron attracting its north pole.

b) The magnet will experience a torque due to the iron attracting its south pole.

c) Whichever pole of the magnet is closest to the iron will be attracted to the iron.

d) Whichever pole of the magnet is closest to the iron will be repelled from the iron.

Explanation / Answer

c) Whichever pole of the magnet is closest to the iron will be attracted to the iron This doesn't even require any theoretical analysis. You can try and see. The point is now about any particular pole attracting it. Magnetic lines of force travel from N-pole to S-pole. So interaction happens due to these lines.

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